Scaffold brackets



2 Sheets-Sheet l D. F. DAKIN SCAFFOLD BRACKETS INVENTOR 9. gZM/WfflAW/N & zioRNEY Sept. 29, 1959 Filed May 21, 1958 SCAFFOLD BRACKETS Filed May 21, 1958 D. F. DAKIN v 2 Sheets-Sheet 2 so ,9; emllilllllll l lH-lll HIHH \l 71 36 m K :5 I? o w INVENTOR.

United States Patent SCAFFOLD BRACKETS .D. .Frank Dakin, IMount Kisco, N.Y.

Application May 21, 1958, Serial No. 736,855

Claims. (Cl. 248-238) This invention relates to brackets for use with ladders in construction and repair work and particularly to brackets designed for attachment 'to'ladders for supporting scaffold planks.

Scafi'olds are commonly supported on ladders disposed in slanted position and when so disposed the bracket must be so designed as to hold the scaffold horizontal.

However, if the ladder is supported in vertical position, as by hooks or supporting rods connected to the cornice or roof, room is provided between the ladder and building wall for the scaffold bracket, or the scaffold bracket can be secured outside of the ladder instead of between the ladder and the wall, provided the ladder is properly and firmly held in position.

This invention has for its salient object to provide a scaffold bracket and means for connecting the bracket to a ladder, so designed that the same bracket and same ladder clamps or connection can be used whether the ladder is disposed in vertical or slanted position.

Another object of the invention is to provide a scaffold bracket that is so constructed that it can be made from standard tubular members or pipe and a bracket that is simple and practical in construction and can be economically manufactured and fabricated.

Another object of the invention is to provide means in connection with a ladder scaffold bracket adaptable for securing the bracket rails of varying sizes and widths.

Another object of the invention is to provide a bracket of the character described with means for locking the bracket to the rungs of the ladder.

Another object of the invention is to provide a bracket of the character described with means for securing the bracket to a fixed structure of a building and for holding the ladder in a vertical position. I

Further objects of the invention will appear from the following specification taken in connection with the drawings which form a part of this application, and in which:

Fig. 1 is a side elevation of a scaffold bracket constructed in accordance with the invention and mounted on a slanting ladder;

Fig. 2 is a top plan view of the structure shown in Fig. 1;

Fig. 3 is a detail elevational view of the outer end of the bracket shown in Fig. 1, showing a guard rail mounted thereon;

Fig. 4 is an elevational view of the scaffold bracket mounted on a vertical ladder;

Fig. 5 is a detail elevational view of the outer end of the bracket shown in Fig. 4, showing an adjustable hook for securing the bracket to a fixed part of a building structure;

Fig. 6 is a view similar to Fig. 5 but showing another attaching device for attaching the bracket to the structure of the building;

Fig. 7 is an enlarged elevational view showing the mechanism for mounting the bracket on a ladder rail;

Fig. 8 is a sectional elevation taken substantially on line 88 of Fig. 7., looking in the direction of the arrows; and

Fig. 9 is a detail elevation, broken away, showing a modified construction.

In the particular embodiment of the invention illustrated, the scaffold bracket is formed of two frames which are pivoted to each other intermediate their .ends upon a pivot bolt 10. Each of the frames consists of upper frame members 11 and 12 intermediate the ends of which there are secured pivot washers or hubs 13 and .14. I

The pivoted .frames also comprise lower frame members .15 and 16 and intermediate the ends of these .members .there are secured pivot washers or hubs 17 and 18. The washers 13,14, .17 and 18 are mounted on the pivot pin .10.

The frame members 11 and 12 are connected to the corresponding lower frame members 15 and 16 by cross braces 20 and at their other ends the frame members 11 and 12 are connected to the other ends of the frame members 15 and 16 by tubular members 21 and 22.

It will be understood from the foregoing description that the frames of the bracket can be swung on the pivot pin 10 to open position, as shown in Fig. 2, or to closed position with relation to each other.

The frame members above described are made of tubular material or pipe and at their inner ends each frame member has threaded thereinto an angular hook '25 on which is mounted a loop 26 of a plate 27 having a slot ZS'intermediate the ends thereof. A bolt 29 extends through the slot in the plate 27 and adjustably secures to the plate a channeled member 311 which embraces one face and the sides of a ladder rail 31.

The hook 25 is threaded on the end and a lock nut may be threaded on the end of the hook to hold the hooks in adjusted position.

When the scaffold bracket is to be mounted on a slanting ladder, as shown in Fig. 1, the channeled member 30 is swung to the position shown in Fig. 8 and embraces the underside of the ladder rail .31. As shown in Fig. 7, the upper and lower edge of the plate having the channel 30 thereon and of the plate 27 are arcuate in shape and are adapted to rest on a ladder rung 35.

If desired, the upper end of the slanting ladder may have projetcions 3111 on the rails 31 .to hold the top of the ladder away from'the wall or roof of the building (see Fig. 9).

In order to secure the plate of the channel 30 and the plate 27 in position on the rung and to prevent displacement thereof, the bolt 29 extends through a plate 36 having arcuate portions 37 and 38 adapted to hook around the rung of the ladder, as shown in Fig. 1. A wing nut 39 secures the locking plate 36, plate 27, and the plate of the channel member 30 tightly together when they are mounted on the ladder in the manner shown in Fig. l.

The channel member 30 which is secured to the lower frame member is swung from the position shown in Fig. 8 through so that the channel will embrace the inner side of the ladder rail.

The ladder bracket, as shown in Fig. 1, has supported in the tubular member 21, an upright post 40, on the upper end of which is formed a loop 46 or an L-shaped bracket 47 for supporting a guard rail 48. The scafiold blanks are mounted on the upper frame members 11 and 12 in the manner shown in Fig. 1. The tubular members '21 or 22 can be used to support a post on which a hoist can be mounted.

When the bracket is mounted on a vertical ladder, as shown in Fig. 4, the bracket and ladder are supported on some fixed part of the building structure in connection with which the ladder and scaffold are to be used. In the detail view shown in Fig. 5, the outer ends of the frame members 11 and 12-have threaded thereinto books 50 which can be threaded outwardly a suflicient extent to extend over a windowsill, or if desired, to extend into openings in the roof. In this manner the bracket will be supported horizontally and the ladder will be spaced away from the house and be held in vertical position. Under these circumstances the guard rail at the end of the bracket remote from the ladder will not be needed, butin case a guard rail is needed it can be mounted in one of the tubular members 22.

Any suitable means can be used for securing the bracket to the building structure and, if desired, instead of using the hooks, securing means, such as that shown in Fig. 6, can be utilized. In this figure there are shown threaded bolts 51 on the outer end of which are pivotally mounted plates 52 which can besecured to the roof or other fixed part of the building structure.

From the foregoing description and from the illustration in Figs. 1 and 4 particularly it will be noted that the bracket, when connected to a vertical ladder, is inverted from the position shown in Fig. 1 in which the bracket is mounted on a slanting ladder.

Although certain specific embodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts may be made without departing from the spirit or scope of the invention, as expressed in the following claims.

What I claim is:

1. A scaffold bracket comprising a pair of frame members hinged together intermediate their ends, each frame member comprising an upper member and a lower member inclined upwardly relatively to the upper member and from one end toward the other end thereof, means at the more widely spaced ends of the upper and lower members of each frame member for securing the bracket to the rails of a ladder, said means including pivoted means to engage and embrace rungs of the ladder.

2. A scaffold bracket comprising a pair of frame members hinged together intermediate their ends, each frame member comprising an upper member and a lower member inclined upwardly relative to the upper member and from one end toward the other end thereof, means at the more widely spaced ends of the upper and lower members of each frame member for securing the bracket to the rails of a ladder, said means including pivoted locking means to engage and embrace rungs of the ladder, and means at the more closely spaced ends of said members for securing said end of the bracket to a fixed structure to which the bracket is to be secured.

3. A scaffold bracket comprising a pair of frame members hinged together intermediate their ends, each frame member comprising an upper member and a lower member inclined upwardly relative to the upper member and from one end toward the other end thereof, means at the more widely spaced ends of the upper and lower members of each frame member for securing the bracket to the rails of a ladder, said means including adjustable means to engage and embrace rungs of the ladder, and adjustable means at the more closely spaced ends of said members for securing said end of the bracket to a fixed structure to which the bracket is to be secured.

4. A scaffold bracket comprising a pair of frame members'hinged together intermediate their ends, each frame member comprising an upper member and a lower member inclined upwardly relative to the upper member and from one end toward the other end thereof, means at the more widely spaced ends of the upper and lower members of each frame member for securing the bracket to the rails of a ladder, said means including pivoted means to engage and embrace rungs of the ladder, and means at the end of the bracket remote from the ladder securing means for supporting a guard rail.

5. A scaffold bracket comprising a pair of frame members hinged together intermediate their ends, each frame member comprising an upper member and a lower member inclined upwardly relative to the upper member and from one end toward the other end thereof, means at the more widely spaced ends of the upper and lower members of each frame member for securing the bracket to the rails of a ladder, said means including pivoted means to engage and embrace rungs of the ladder, and a plurality of means at the end of the bracket remote from the ladder securing means for supporting a guard rail whether the bracket is secured to a vertical ladder or to a slanting ladder.

References Cited in the file of this patent UNITED STATES PATENTS 1,077,839 Kingston Nov. 4, 1913 2,237,596 Eiler Apr. 8, 1941 2,678,243 Masse May 11, 1954 2,806,642 Miele Sept. 17, 1957 2,838,342 Masse June 10, 1958 

